Exerciser



FIG. 1 is a perspective view of an exerciser showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof; and,

FIG. 6 is a top view thereof, the bottom view being a mirror imagethereof.

The ornamental design for an exerciser, as shown and described.